I am new to the whole bonsai experience,i recently purchased a pre- bonsai Trident Maple (acer beurgerianum) from a bonsai store,currently in NSW we are having extreme heat waves this summer roughly 35C-40C and it seems that my trident maple is having a hard time( it is still in a pot as i was told not to repot/replant untill spring(not sure if correct),i currently water it thoroughly in the morning ( water untill it leaks out of the bottom of the pot) i also spray the leaves with water, i place it in the morning sun until about midday(Roughly 8am-12pm),then move it into the shade,what i have noticed is that leaves are beginning to wilt and some of the tips of the leaves look to be dead, this frightens me(it could also be water damage to the leaves from possibly spraying water too hard onto the leaves?).Any fellow bonsai enthusiasts who grow trident maples/maples in general who can offer advice? thanks a bunch in advance ,also anyone who lives in NSW and has tips for bonsai surviving summer would be much appreicated

Thanks in advance,
Kris